If you have a widescreen monitor and want games to be able to use it, you can find out how to do that with many games here:
http://www.widescreengamingforum.com
Please note that old DOS games tended to use a resolution of 320×200. Oddly enough, this is a 16:10 resolution and will fit perfectly on most widescreen monitors. If you use a 2x filter, the screen will be 640×400, 3x will be 960×600. This is one of the reasons I really hated it when Nvidia couldn’t do custom resolutions* on vista for a while because I like to use 3x filters in DOSBox and SCUMMVM. Just make sure that the “Correct aspect ratio” option is not enabled in whatever program you use, or it will be converted to a 4:3 ratio.
You may also wish to add custom WS resolutions in cases where you want to play in widescreen, but your video card can’t handle 1680×1050. You can use the custom resolutions option to add 1280×800 or 1280×768 if you needed a 16:9 res.
To do this with nvidia cards, open up the nvidia control panel and click on Manage Custom Resolutions. Then click Create. Then type in the resolution you want and the color depth. If you have an LCD screen, you can probably leave the refresh rate alone.
Click advanced to open up the advanced controls. Here you may need to play around with the “Timing Standard” For my Dell 24″ monitor, I always have to set the standard to CVT Reduced blank. If I don’t, then my monitor is not sent the actual resolution that I want it to get, but something close to it, usually in a 4:3 ratio. Then click test to test the new resolution and if it works, you’re done.
Please note that if you set the color depth to 32-bit, but later want to run a program that runs at 960×600x16, you’ll have to add that.
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*Before Nvidia drivers could do real custom timings in Vista, adding a custom resolution would do this:
960×600(16:10=1280×1024(5:4)
1280×960(4:3)=1280×1024(5:4)
1280×768(16:9)=1280×1024(5:4)
That’s right, it would just stretch and distort the resolution to the next one that it supported, even if the next one was the wrong ratio. This was bad for two reasons.
1. I’d have to set my monitor to stretch it to full screen. For the 960×600, this is acceptable. However, for the 16:9 1280×768, everything was distorted no matter what. This was a problem, because there are some games like the first Knights of the Old Republic that have 1280×768 as the only WS resolution that they truly support even with work. (There are ways to force another res, but most of those screw up the HUD.) And I’m still not sure how a 5:4 resolution became standard to start with.
2. Nvidia’s “Scaling” looks way way too blurry compared to my monitor’s scaling ability which looks quite clear, even on 640×400.
I and many others were so glad when they figured out how to do real custom timings in Vista and am very glad this is not an issue with Windows 7.

